The problem with the regular button is that it shows the GCD, rather than the remaining time on Lifebloom. I'd like to be able to macro a target, place the macro button somewhere, and be able to actually press the button, which is also a countdown timer. I could macro the tank and keep lifeblooms rolling by having the button right above my Grid. (Most healers are keyboard turners, and I use 4 different Cliques along with 4 number keys to heal.) Or even better, incorporate the addon functionality that lets you set targets, like Bloomer http://www.wowinterface.com/downloads/info10505-Bloomer.html.

It might also be neat for DoT classes and other heal classes to be able to press the actual bar, when in a hurry.